Home / 13,620.48-20,430.72-3,761.16

Finding the Fourth Proportional to 13,620.48, 20,430.72 and 3,761.16

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Solution

The fourth proportional to 13,620.48, 20,430.72 and 3,761.16 is: 5,641.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.48 : 20,430.72 = 3,761.16 : x
  2. Step 2: Convert to fraction form
    13,620.48/20,430.72 = 3,761.16/x
  3. Step 3: Cross multiply
    13,620.48x = 20,430.72 × 3,761.16
  4. Step 4: Simplify right side
    13,620.48x = 76,843,206.84
  5. Step 5: Solve for x
    x = 76,843,206.84/13,620.48
  6. Step 6: Final answer
    x = 5,641.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.